Logic Masters Deutschland e.V.

Rules:

Normal Sudoku rules apply. Place the digits 1-9 once each in every row, column, and 3x3 box.
White lines contain consecutive digits.
All digits on gray lines are the same.
Digits along an arrow sum to that arrow’s circle.
Gray dots separate dominoes that either all have the same sum or all have the same difference.

To Play:
SudokuPad